Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 25,648,849	$ 17,164,177
Investment in debt securities - available for sale, at fair value	28,864,364
Accrued interest on investment in debt securities	38,404
Advances and deposits on clinical programs and other current assets	2,213,262	1,660,695
Total current assets	56,764,879	18,824,872
Property and equipment (at cost, less accumulated depreciation and amortization)	486,022	294,551
Other assets:
Money market investments, restricted cash	6,000,000
Deferred income tax asset		1,845,823
In-process research and development, net	13,366,234	13,366,234
Goodwill	1,976,101	1,976,101
Operating lease right-of-use assets, net	816,520	1,047,336
Other intangible assets, net		113,660
Deposits and other assets	58,761	58,761
Total other assets	22,217,616	18,407,915
Total assets	79,468,517	37,527,338
Current liabilities:
Accounts payable – trade	2,615,992	2,244,847
Other accrued liabilities	2,824,788	2,458,532
Notes payable – current portion, net of deferred financing costs		1,116,663
Operating lease liability - current portion	534,256	433,413
Deferred revenue - current portion	500,000	500,000
Total current liabilities	6,475,036	6,753,455
Earn-out milestone liability	7,345,000	7,018,000
Notes payable – non-current portion, net of deferred financing costs	5,808,774	3,934,497
Operating lease liability - non-current portion	373,526	710,305
Deferred revenue - non-current portion	125,000	500,000
Total liabilities	20,127,336	18,916,257
Commitments and contingencies
Stockholders’ equity:
Preferred Stock - $0.01 par value (100,000 shares authorized, and no shares issued or outstanding at September 30, 2021 and December 31, 2020)
Common stock - $0.01 par value (112,500,000 shares authorized; 86,558,070 and 40,701,356 shares issued at September 30, 2021 and December 31, 2020, respectively, and 86,557,736 and 40,701,022 shares outstanding at September 30, 2021 and December 31, 2020, respectively)	865,581	407,014
Additional paid-in capital	387,106,934	330,289,596
Accumulated other comprehensive loss	2,139
Accumulated deficit	(328,548,285)	(312,000,341)
Total stockholders’ equity before treasury stock	59,426,369	18,696,269
Treasury stock, at cost (334 shares at September 30, 2021 and December 31, 2020)	(85,188)	(85,188)
Total stockholders’ equity	59,341,181	18,611,081
Total liabilities and stockholders’ equity	$ 79,468,517	$ 37,527,338

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).